added tests that throw exceptions

src/test/java/SampleTest.java

@@ -22,6 +22,24 @@ public class SampleTest extends TestResult {
         assertEquals( (a + b), 30 );
     }
 
+    @org.junit.Test(timeout = 500)
+    public void WithDelay() throws InterruptedException {
+        int a = 10;
+        int b = 20;
+        Thread.sleep(1000);
+        assertEquals( (a + b), 30 );
+    }
+
+    @org.junit.Test(expected = ArithmeticException.class)
+    public void withException() {
+        int a = 10;
+        int b = 20;
+        int res = a + b;
+
+        throw new ArithmeticException("some error happened");
+    }
+
+
     public synchronized void stop() {
         // stop test here
     }